Other M seems have this looping nature to it when it comes to power-ups, at least for some (Diffusion Beam, Speed Boost for example). You go forward, loop around, and at the end you get the item and then you're back a little behind where you originally were. There's no "exploration" for power-ups, but for the most part, they put them where they put them. Even the Varia Suit's stupid activation, I still like the area before you get it because it's different and mildly challenging the first time you go through it. I wish I could fight the boss without the Varia suit, too.
As far as item exploration goes, Other M is basically micro-exploration. Instead of focusing on path branching to find expansions, it's all about finding the nooks and crannies.
As far as item exploration goes, Other M is basically micro-exploration. Instead of focusing on path branching to find expansions, it's all about finding the nooks and crannies.